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As my GC approaches 100K (trouble free, except for lifter replacement @ 70K [covered under extended warranty]), what preventative maintenance would you recommend?...throttle body cleaning? Transmission service ?(it’s running butter smooth now)
The GC has been great so far, and I want to keep it that way, with careful preve maintenance.
Thanks in advance for your excellent advice.
Jim Durkin
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2014 Summit 5.7 4wd 20" tires swapped to 18", added all skid plates
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1,789 Posts
I'd do a trans service. I'd also replace front and rear differential fluids and transfer case fluids unless you have already done that within past 30K. Might consider flush of the brake system too. As well as coolant flush.. depending on if and when last done.
 

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2015 WK2 Overland
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As mentioned above the diffs and transfer case would be a good idea. Fluid is cheap and all 3 are easy to do. The trans comes with controversy. The pan is plastic with an integrated filter and seal so that has to be replaced and the fill procedure is specialized so if you aren't comfortable with all of that it might be a dealer or specialist task. There is no service interval on the trans. It seems to keep the converter locked most of the time and the temps down so I'm not going to worry about servicing mine at any point in the near future, just my opinion of course.
 
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